Am I studying many languages in few time?

I'm 17, at school I study 3 languages (english, french, german). 
At home I study spanish as well (reading, writing and listening). 
Do you think I can confuse myself and that I can overlap the words? 
My levels are: 
English: B1-B2 
French: B1 
German: A1 
Spanish: A1-A2

Especially French and Spanish, if I study both at home, can I overlap?